P0451

EVAP System Pressure Sensor/Switch A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Increased fuel consumption
Smell of gasoline in the cabin

Causes

EVAP system pressure sensor malfunction
Open or short circuit in wiring harness
Problems with the engine control unit
Clogged or damaged EVAP system lines

How to Fix

Check the integrity of the sensor wiring harness
Check the resistance and voltage of the pressure sensor
Clean or replace pressure sensor
Check the EVAP system for leaks

Related codes

P0440 P0442 P0455